Pulley.



No. 732,549. PATENTED JUNE 30, 1903.

H. T. HALLOWELL.

PULLEY.

APPLICATION IILIID D120. 21, 1901.

K0 MODEL.

m: NORRIS warms 00., Puorourm" WASHINGTON, 0. c.

PATBNTED JUNE 30, 1903.

H. T. HALLOWELL.

PULLBY.

rrmommx FILED D110. 21, 1901.

2 sums-sum 2.

7 N0 MODEL.

V WELL, a citizen of the United States, residing U rrnD STATES Patented June 30, 1903.

PATENT ()rrion.

PU LLEY.

SPECIFICATION forming part of Letters Patent No. 732.549, dated June 30, 1903.

Application filed December 21,1901. Serial No. 86,856. No model.)

To all whom it may concern;

Be it known that I, HOWARD T. HALLO- in the city and county of Philadelphia, State of Pennsylvania, have invented a new and useful Improvement in Pulleys, of which the following is a specification.

My invention consists of an improvedconstruction of pulley, which has been designed to overcome the defects common in pulleys now in use, since the wooden hubs which are usually used in wooden pulleys are always changing with the conditions of the atmosphere, thereby making them clamp the shaft very uncertainly, excepting under exceptionally favorable conditions. In wooden-hub pulleys heretofore manufactured it has been necessary for strength to make the hub of abnormal size, which has caused the same to act as a fan havinghuge and unsightly revolving paddles.

By my construction I employ a metallic hub-shell and metallic angular arms extending therefrom to the rim of-the pulley, whereby any size diameter of pulley can be made by using the'proper angles and any width of face can also be made with equal ease and with increased strength by simply separating the angles on the hub-shell to correspond with the face of the pulley, or in certain cases other angles, Ts, or the like may be inserted within the outer angles to give the requisite increased. strength. By the use of my novel construction of hub-shell and its. adjuncts I can make a hub projectingfrom the arms of responding parts inthe figures.-

the pulley. I

Figure 1 represents a sideelevation of a pulley embodying my invention, wherein I have shown the same as apulley having-a steel hub and a wooden rim'. Fig? 2 repre-' sents a section of the hub'on line 00 m, Fig. 1, omitting the bushing-sections 8. Figs. 3, 4, and 5 represent detail views showing different devices which may: be employed for securing the spokes of the pulley to the rim thereof. Fig. 6 represents a side elevation of a portion of the hub-shell and clamp employed, showing lips acting as a key. Fig. 7

represents a side elevation of a portion of the hub-shell and its adjuncts, showing also a plate 'connectin g and stiffening the flanges of the angles therein. Fig. 8 represents a longi- -wherein I have dispensed with the hub-shell preferably employed. Fig. 10 represents another modification, wherein I locate the hubshell on the outer side of the angle-flanges employed. Fig.11 represents a side elevation of a pulley, but showing. the arms deflected at their edges for the purposes of strength and to'enable them to cut the air more readily. Fig; 12 represents a side elevation of the bushing which may be employed in conjunction with my improved pulley. Fig. 13 represents a section on line z 2, Fig. 12. Figs. 14 and 15 represent transverse sectional views on line 2; .2, Fig. 12, showing a modification which may be employed. Fig. 16 represents a side elevation showing the hub of the pulley provided with angleiron spokes having deflected flanges and tapering portions. Fig. 17 represents a side elevation similar to Fig. 16, but showing a modified construct-ion of spokes. Fig. 18 represents a front elevation, partly in section,

Referring to the drawings, referring first to Fig. 1, I have shown as one embodimentof any-invention a pulley '1, provided with a wooden rim 2, to which are secured the angular arms 3, forming the main portion of the pulley and consisting of the flanges 4 and 5, whose extremities may be secured to the contiguous portions of the wooden rim by means of the lips 6, which project from the angular arms 3 and are adapted to fit in contiguous saw-kerfs in the wooden rim 2. The arms 3 are preferably swelled out or provided with recesses at abouttheir central portion, at which point is located the hub-shell 7, the latter being made in sections, as will be understood from Fig. 1, and containing the bushing-sections 8, between which is located the shaft 9. It will be seen that the flanges 4 and 5 project endwise outwardly to the rim from the curved depression, forming lateral and diametric strengtheningmeans. The arms 3 are held in their proper position by means of the fastening devices 10 and 11, and at the extremities of said arms are employed the additional fas- 1 tening devices, which are of the form seen in sist in distributing the load over the entire face of the pulley, especially when the rim is composed of the familiar small wooden segments, a construction old to the art. also to use this footing-piece under lip of the device 12, so that after the pulley is assembled this footing-piece may be driven firmly.

into place, thus securely tying the arms to the rim and enabling the arms to be fastened to the rim at a suitable distance from where T the :rim is parted for a split pulley, thus greatly strengthening the junction. It will be noticed that these arms 3 are continuous from one side of the pulley to the other and eaehhub-shell is secured to a contiguous arm and the said arms form the main portion of;

the pulley.

In the construction of large pulleys I f urther brace and reinforce the same by the employment of the supporting-spokes 13, which are preferably assembled and secured in position as shown in Fig. 1.

In Fig. 6 I have shown the hubshell 7 as:

secured to the contiguous arm 3, which latter also serves as a support for the clamp or strengthcningdeviee 14, the hub-shells in this case having lips which act as keys, so that when bushings are employed the rivets securing the hub-shells to the arms or angles 3 will not be easily sheared by the torsional strain when the pulley is clamped to the shaft. The projecting end portions 15 of the hub-clamps are to receive the clamp-bolts, thereby reinforcing the hub portion of the angle-iron arms, so that the metal of the arms will not spring when the bolts or clamping devices are tightened. These reinforcing devices may be made in various ways without departing from this invention.

In Fig. 7 I have shown the arm or angle 3, to which the hub-shell 7 is secured, strengthened and reinforced by a plate 15, which connects and acts as a bridge to stiffen the flanges of the angles, and I have in this instance shown said flanges as sheared at the point 16, and said bridge may be used in connection I wish 1 with the construction shown in Fig. ,111, if desired.

In Fig. 8 I have shown a sectional view of another manner of securing the hub-shell 7 in position, wherein 17 designates angle-iron spoke-flanges secured to said hub-shell, which latter is provided with a recess or hole 18, in which is seated a trunnion 19 of the bushing 20 when the latter is employed.

In Fig. 9 I have shown a slightlyanodified construction, wherein the hubshell is dispensed with, the shaft 9 being held in position in substantially the manner described and the flanges 4 connected by the bolts 4".

It is desired for small-diameter pulleys to dispense with hub-shells, as the angle-iron spokes are sufficiently rigid laterally; but I prefer to use the hub-shells in most'cases.

In Fig. 10 I have shown the hub-shell -7 as placed on the outer portion of the angle flanges or arms 3.

In Fig. 11 I have shown .a pulley 21 with a metal rim 22 and arms 23, which.areprovided with the hub-shell sections '7, already described, said arms, however, having the deflected flanges 2-t, whereby great strength and rigidity are attained and the air is enabled to be readily cut as the pulley revolves. If desired. I may construct the rim 22 as shown at the joint 25, where the abutting terminals thereof are turned inwardly, or, if desired, I may construct the rim having its abutting portions located end to end,.as indicated at 26, it being apparent that either or both of the fastening means 27 or 28 may beemployed tosecure the parts in assembled position.

The angle-iron spokes 23 (seen in Fig. 11) may have the flanges on their outer ends turned up, forming feet to which the rim may be secured.

It will be apparent that the angles may not extend straight from the center or hub to the rim, as now shown, but they may come nearer together at the rim-joint than they are at the hub, thereby dispensing with the washers 30, if desired. V

\Vhen the construction seen in Fig. 1.1 is employed, I consider it essential to use the spokes 29 in order to support and strengthen the rim 22; but it will be apparent that the spokes may be made differently from the form shown and they need not necessarily have feet thereon, as shown in the present instance.

For large-diameter pulleys I prefer to use semicircular strengthening-rings, which are adapted to be attached to the spokes 29 and the angle-irons 23, it being understood that the semicircular rings may be made of such diameter so that the spokes 29 and 23 may be rigidly connected at a suitable distance between the hub and rim portions of the pulleys. A small-size ring showing the principle is better shown in Fig. 23, which maybe equally applied to Fig. 1.

It will be apparent that, if desired, I may employ two fastening means (shown in Fig.

' employ one or the other fastening devices,

according to requirements.

The bushing 20, (seen in Fig. 12,) as already explained, is provided with trunnions 19, which are adapted to coact with the recess 18,

(seen in Fig. 8,) said trunnions 19 being supported by a connecting-bridge 34, seen in section in Fig. 13, Where is cut away a great excess of metal, it being apparent that, if desired, I may cast the bushing solid, as shown in Fig. 13, and by means of a drift split the same after it has been machined, or, if desired, the bushing maybe separated by an ordinary cutting tool, a special feature, to which I desire to call attention, being that I do not finish the bore of the bushing, excepting at the ends, thereby saving considerable time and expense. The bushing may be cast without being split, it'being, however, apparent that the bridge shown in section, connecting the two finished ends 35 and 36, is the same as the bridge and its adjuncts seen in Fig. 13.

In Fig. 15 I have shown a construction of bushing wherein I carry the bridge or connecting-rib farther around circumferentially; but this rib is not finished, although where the bushing is very thin I may find it necessary to finish the connecting-rim, which liesnext to the inner bore thereof.

It will be understood that I need not necessarily split my bushing, but that the same can be made without necessitating the finishing of that portion under the trunnion, no matter whether the trunnion be located on a rib that is the width circumferentially as seen in Fig. 15 or not. I

In Fig. 16 I have shown the spokes 41' as constructed of angle-irons having deflected flanges, said spokes being also show-n as tapering, it being understood that the hole 42 is for the insertion of the trunnion 19 of the bushing employed, which may be any of the forms seen in Figs. 14 and 15.

In the construction seen in Fig. 17 I have shown the angles or spokes 43 as provided with deflected flanges, or, if desired, said spokes may be of any shape, as indicated at 44, it being of course understood that I can either deflect the flanges'from end to end, as seen in Fig. 16, or partially, as seen in I the upper portion of Fig. 17, or not at all, as in dicated in the lower portion of said latter figure.

It will be apparent that, if desired, I may employ the construction of spokes seenin Fig. 17 in the same pulley, or, if deemed expedient, I may employ either form, according to requirements.

It will of course be apparent that, if desired, the spokes may be either secured directly to the rim 46 or secured to either angle or T irons, which may be eitherpartially or wholly within the semicircumference of the pulley.

In Fig. 18 I have shown-the spokes 52 asmade of slightly-different contour, the .construction seen therein being applicable for pulleys having a narrow face of small diameter, it being, however, preferable in practice to make thespokes of angle-iron, since no new dies will be necessary.

In Fig. 19 I have shown a slightly-modified construction of a hub-shell and spokes of a pulley.

In Fig. 20 I have shown another embodiment of my invention wherein I employ a channeled segment, as 53, which may be secured within the pulley-rim 54.

It will thus be seen from the foregoing that while I have shown various embodiments of the principle of my invention I have followed in each case the same general construction for the hub, wherein I have employed a plurality of angle-irons, to which a separable hub-shell without departing from the principle of the invention, and in Figs. 21, 22, and 23 I have shown some of those that time. i

It will be apparent that the broad feature of my invention is applicable to rims made either from paper, steel, wood, or other ma terial and that various modifications involving slight changes in the ends of the angles and the manner of securing the angles to the rim may be made by those skilled in the-art which will fall within the scope of my invention. The angles, arranged in substantially diametrical relation to the rim in conjunction with the hub-shell, are an important feature of my invention; but it will be apparent that the hub-shell may be omitted, said shell acting in reality as a hub and also as a means for tying the angles in their respective positions. I also attach importance to the use of the deflected flanges on the spoke-arms, as seen in Figs. 16, 17 18, whereby great rigidity is attained and the flanges are enabled t cut the air as the pulley revolves.

In many size pulleys where strength is not desired I prefer to shear the flanges *of the spoke-arms instead of deflecting them.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

I 1. A diametrically-parted pulley, each part of which is provided with two separate angleiron spoke -bars approximately equal in length to the diameter of the pulley, each-separate spoke-bar being provided with a curved depression at substantially the central portion thereof, a rim, each of said angle-iron spokeba'rs having both its flanges which comprise the same projecting endwise outwardly toward the rim from said depressions,-means securing the ends of the spoke-bars to the rim adjacent its meeting edges, shaft-fitting hubshells secured in said depressions againstroj tary movement and clamping-bolts passing occur to me at this through and engaging the flanges of said angle-iron spoke-bars and securing them together with a space laterally therebetween.

2. A parted pulley comprising a rim portion, four separate angle-iron spoke-bars, said spoke-bars approximately equal in length to the diameter of the pulley and formed with curved depressions at substantially the central portion thereof, both flanges forming said angle bars projecting endwise outwardly from the said depressions toward the rim, fastening devices securing the outer ends of the spoke-bars to the rim and clamping devices passed through and engaging the flanges of said angle-iron spoke-bars and securing them with spaces laterally and diametrically'between them.

3. A parted pulley comprising a rim portion, four separate angle-iron spoke-bars, said spoke-bars approximately equal in length to the diameter of the pulley and formed with curved depressions at substantially the central portion thereof, both flanges forming said angle-iron bars projecting endwise outwardly from the said depressions toward the rim, fastening devices securing the outer ends of the spoke-bars to the rim, and clamping devices passed through and engaging the flanges of said angle-iron spoke-bars and securing them with spaces laterally and diametrically between them, combined with circular shaftfitting hub-shellslocated in said depressions.

4. A parted pulley comprising a rim portion, four separate angle-iron spoke-bars approximately equal in length to the diameter of the pulley and formed with curved depressions at substantially the central portion thereof, said angle-iron spoke-bars having their lateral and diametric flanges projecting endwise outward toward the rim from said depressions, means securing said spoke-bars to the rim portion, circular shaft-fitting hubshells located in said depressions, means securing said spoke-bars together with spaces therebetween, reinforcing bolt-blocks mounted on the flanges of said spoke-bars adjacent said depressions, and clamping-bolts for securing said bolt-blocks in place.

5. A separable pulley embodying a plurality of angle-iron spoke-arms, a sectional rim to each section of which the ends of one of said arms are secured, said arms having curved portions intermediate their ends, hubshells conforming to "and secured within said curved portions, the spokes radiating from said arms and secured to the rim, means connecting said arms near the rim and means connecting said arms upon opposite sides of their curved portions, and sectional metallic bushings interposed between said shells and the shaft of the pulley, the bushing-sections having trunnions mounted in said shells.

6. A pulley embodying a plurality of angleiron spoke-arms, circular shells, said arms conforming to the contour" of said circular shells upon which the said angle-irons are attached and to which they are secured at the hub portion of the pulley, a bushing received in said shells and interposed between said shaft and pulley-hub, said bushing having two distinct end portions which are adapted to be finished to fit the shaft and pulley-hub, said distinct end portions of bushing being secured together by means of a connectingrib acting as a bridge over a shaft, a portion of said bridge being adapted to form a trunnion which enters the hub of the pulley, said bushing being finished only on the ends, the intermediate portions being cut away.

7. A pulley, in combination with a metal bushing interposed between the hub portion of the pulley and shaft, said bushing in halves, each half of which enters the corresponding half of the pulley, said bushing consisting of two end portions finished to fit the shaft and pulley-hub, and ribs 011 the end portions of the bushing, in combination with a longitudinal connecting-bridge over said shaft and upon which bridge a trunnion is mounted for the purpose of entering a suitable recess in said pulley-hub.

8. A pulley, ,in combination with metal bushings interposed between the hub portion of the pulley and shaft, said bushings being in halves and consisting of two distinct end portions, said portions united by a longitudinal connecting rib carrying a trunnion adapted to enter suitable recesses in said pulley-hub, said bushings being separated with end portions finished.

9. A pulley embodying a hub portion, and separable metal bushing comprising end portions, a connecting-rib, and trunnions carried thereby to engage in recesses in the pulleyhub, the said portions having end portions finished.

10. In a separable pulley, semicircular shells, rim portions, angle-iron spoke-arms conforming to said semicircular shells at the hub portion of said angle-irons, to which shells the angle-irons are secured, said semicircular shells receiving the shaft of the pulley combined with semicircular bushings interposed between the rim portions-of said shells and shaft, said bushings having trunnions adapted to enter recesses in said shells attached to angle-iron spoke-arms.

11. In a pulley, angle-iron spoke-arms, a sectional rim to which the ends of one of said arms are secured, said arms having curved portions intermediate their ends, hub'shells conforming to and secured in said curved portions, sectional trunnioned bushing and strengthening members conforming to the shape of the arms at the h ub portion.

12. In a pulley, angle-iron spoke-arms, a sectional rim to which the ends of said arms are secured, said arms having curved portions intermediate their ends, l1ubshells conforming to and secured in said curved portions, sectional trunnioned bushing and strengthening members having lips acting as keys and conforming to the shape of the arms at the hub portion.

13. A parted pulley comprising a separate rim portion, four separate angle-iron spokebars, said bars in length being approximately equal to the diameter of the pulley and formed With curved depressions at substantially the central portion thereof and With lateral and diametric flanges projecting endwis'e out- Wardly toward said rim from said curved depressions, means securing said spoke-bars together With a space intervening, means at taching the ends of the spoke-bars to the rim portion adjacent the meeting edges thereof, separate auxiliary spoke-arms, means attaching the same to said rim and to the flanges of said angle-iron spoke-bars adjacent the curved depressions and fastening devices passing through and engaging the flanges of said angle-iron spoke-bars adjacent the curved depressions.

14:. A parted pulley comprising a separate rim portion, four separate angle-iron spokebars, said bars in length being approximately equal to the diameter of the pulley and formed with curved depressions substantially at the center and With lateral and diametric flanges 15. In a split pulley a rim portion, angleiron arms secured thereto and having curved recesses intermediate their ends, hub-shells secured to said angle-irons and conforming to said curved recesses, sectional trunnioned bushings and hub-clamps mounted on the flanges of the an gle-irons at the hub portions.

HOWARD T, HALLOWELL. Witnesses:

JOHN A. WIEnERsHnIM, E. HAYWARD FAIRBANKS. 

